CN112464469A - Characteristic polymerization part structure for machining research and machining process optimization method - Google Patents
Characteristic polymerization part structure for machining research and machining process optimization method Download PDFInfo
- Publication number
- CN112464469A CN112464469A CN202011336139.5A CN202011336139A CN112464469A CN 112464469 A CN112464469 A CN 112464469A CN 202011336139 A CN202011336139 A CN 202011336139A CN 112464469 A CN112464469 A CN 112464469A
- Authority
- CN
- China
- Prior art keywords
- machining
- arc
- cavity
- part structure
- processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/69—Microscopic objects, e.g. biological cells or cellular parts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention belongs to the field of machining, and particularly relates to a characteristic polymerization part structure for machining research and a machining process optimization method. The characteristic polymerization part structure comprises a closed deep cavity, an open deep cavity, a thin wall, a stepped hole, a large arc surface, an outer arc corner and an inner arc corner. Then, the invention carries out processing research on various typical characteristics in the characteristic polymerization part structure, controls the processing precision and the surface roughness of each typical characteristic by adjusting processing parameters and a processing cutter, further screens out the optimal processing technology and the processing cutter of the typical difficult-to-process characteristics of each part to be processed, and realizes the processing simulation of the typical characteristics in various parts to be processed.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a characteristic polymerization part structure for machining research and a machining process optimization method.
Background
At present, aerospace parts with complex structures are increasingly applied to aerospace structures, and compared with the traditional simple aerospace structural parts, the traditional complex structural parts have the characteristics of deep cavities, deep holes, large cambered surfaces, small-angle corners, thin walls and the like which are difficult to process. The complex structures jointly form the features of low weight and high strength of aerospace structural parts, and the material processing removal rate of the complex structures in the whole cutting processing and manufacturing process is as high as more than 80%. However, due to the precision requirement in the military field such as aerospace, the complex structure also brings a series of processing problems: the cutter is easy to damage in the machining process, the machining precision is difficult to guarantee, and the part is easy to deform in the machining process. In addition, before each aerospace complex structural member enters batch production, a large number of process verifications are required to ensure the processing quality and the product percent of pass. However, the aerospace metal material has high cost and poor processing property, so that the single process parameter verification of the actual aerospace structural member becomes a process consuming a large amount of time cost and material cost.
Therefore, it is necessary to provide a part structure and a method for conducting research on machining before mass production of aerospace complex structural members to verify the qualification degree of the machining process.
Disclosure of Invention
In order to solve the problems, the invention provides a feature polymerization part structure for processing technology research and a processing technology optimization method, wherein typical difficult-to-process features in various parts to be processed are extracted and polymerized, and then various typical features in the parts are processed and researched; the machining precision and the surface roughness of each typical characteristic are controlled by adjusting machining parameters and machining tools, so that the optimal machining process and machining tools of typical difficult-to-machine characteristics of each part to be machined are screened out, and machining simulation of the typical characteristics in various parts to be machined is realized.
In order to achieve the above object, the present invention provides a characteristic polymeric part structure for processing research, comprising a closed deep cavity, an open deep cavity, a thin wall, a stepped hole, a large arc surface, an outer arc corner and an inner arc corner;
the top surface of the closed deep cavity is opened, and the cavity depth is more than or equal to 80 mm; the top surface and the side surface of the open type deep cavity are both open, and the cavity depth is more than or equal to 90 mm; the wall thickness of the thin wall is between 1mm and 5mm, and the length of the thin wall is more than or equal to 50 mm; the central line of the stepped hole is superposed with the central line of a small open structure, the small open structure is provided with an arc corner with the radius less than or equal to 18mm, and the minimum aperture of the stepped hole is greater than or equal to 12 mm; the large arc surface is a multi-radius arc surface and has the total arc length of more than or equal to 150 mm.
Preferably, the closed deep cavity is a rounded rectangular cavity.
Preferably, the thin wall is a common side face of the closed deep cavity and the arc inner cavity.
Preferably, the symbiotic structure of the open deep cavity, the thin wall and the large arc surface is an arc inner cavity with an opening on the top surface; the thin wall is a common wall of the open deep cavity and the arc inner cavity; the large arc surface is the arc side surface of the arc inner cavity.
Preferably, the outer and inner arcuate corners abut the thin wall.
The invention also provides a processing technology optimization method for polymerizing a part structure by utilizing the characteristics, which comprises the following steps:
s1: building a three-dimensional model of the part structure according to the characteristics by using three-dimensional software;
s2: preparing a cuboid blank;
s3: processing the cuboid blank prepared in the step S2 by using a cutter with the processing length larger than 100mm and based on the three-dimensional model established in the step S1 with different cutting parameters to obtain different processing precision;
s4: measuring cutting temperature and cutting force under different cutting parameters in the machining process;
s5: measuring the abrasion loss of the cutter after the machining is finished;
s6: measuring the machining precision of the part after machining;
s7: adjusting the cutting parameters according to the measurement results of the steps S3-S6, and repeating the steps S3-S6 again until the optimal machining precision is obtained.
Preferably, in step S4, the cutting temperature and the cutting force are detected by a thermocouple and a cutting load cell.
Preferably, in step S5, the degree of wear of the tool is measured using a microscope.
Preferably, in step S6, the machining precision under different cutting parameters is measured by using a three-coordinate measuring machine and a surface roughness meter.
The invention has the beneficial effects that:
1) the characteristic polymerization part structure can be used for researching the machining process before the formal production of parts, and can be used for researching typical difficult-to-machine characteristic parts of various parts, so that the time cost and the material cost of a process verification link are reduced;
2) the feature polymerization part structure still remains a large machining allowance (namely, after the machining verification is carried out once, the machining allowance is still reserved, the machining verification can be carried out for multiple times, and the structure is completely shaped after the one-time machining), so that the opportunity of modifying machining parameters for multiple times for verification can be provided, and the trial and error cost of the process verification is reduced;
3) the characteristic polymerization part structure can effectively control the machining precision in the machining process of the characteristic part which is typically difficult to machine, and reduce the machining deformation, thereby improving the production qualification rate of the part in the actual production.
Drawings
FIG. 1 is a front isometric view of a feature polymeric part structure for tooling studies in accordance with an embodiment of the present invention;
FIG. 2 is a rear isometric view of a feature polymeric part structure for machining studies in accordance with an embodiment of the present invention;
FIG. 3 is a top view of a feature polymeric part structure for tooling studies in accordance with an embodiment of the present invention;
FIG. 4 is a flow chart of a process optimization method for processing a feature polymeric part structure for research using an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples, it being understood that the examples described below are intended to facilitate the understanding of the invention, and are not intended to limit it in any way.
Because the complex structure of the aerospace structural member has the characteristics of difficult processing of deep cavities, deep holes, large cambered surfaces, arc corners, thin walls and the like, before batch production, strict process verification is required to be carried out, and the optimal processing parameters in the processing process are determined. This embodiment uses the aerospace structure to hang the front-axle beam, prevent hot wall and attach fitting as the example, and above-mentioned three kinds of structures include following 7 difficult processing characteristics: the closed deep cavity, the open deep cavity, the thin wall, the stepped hole, the large arc surface, the outer arc corner, the inner arc corner and the arc inner cavity. This example extracts and assembles these difficult-to-machine features into a feature-aggregated part structure as shown in fig. 1-3.
Specifically, the characteristic polymeric part structure of the present embodiment includes a closed deep cavity 1, an open deep cavity 2, a thin wall 3, a stepped hole 4, a large arc surface 5, an outer arc corner 6, an inner arc corner 7, and an arc inner cavity 8. As shown in fig. 1-3, the closed deep cavity 1 is mostly a closed deep cavity, but its upper half part still has an open cavity structure, and the whole cavity is in the shape of rounded rectangle and the cavity depth is greater than or equal to 80 mm. The top surface and the side surface of the open type deep cavity 4 are both open, and the cavity depth is more than or equal to 90 mm. The thin wall 3 is a common structure of the closed deep cavity 1 and the arc deep cavity 8, the wall thickness is between 1mm and 3mm, and the length is more than or equal to 50 mm. The central line of the stepped hole 4 coincides with the central line of the small open structure, wherein the radius of the arc corner in the small open structure is not more than 18mm, and the minimum aperture of the stepped hole 4 is not less than 12 mm. The outer arc corner 6 and the inner arc corner 7 act on the connecting part of the thin wall 2, the large arc surface 5 and the open deep cavity 2 respectively, and as can be seen from fig. 3, the outer arc corner 6 and the inner arc corner 7 can influence the wall thickness of the part, so that the structural strength and the rigidity of the part are changed. The large arc surface 5 is a multi-radius arc surface and has the total arc length of more than or equal to 150 mm. In the present embodiment, the arc inner cavity 8 belongs to a symbiotic structure of the large arc surface 5, the thin wall 3, the inner arc corner 7 and the open deep cavity 2, and the structural size thereof is influenced by other structural sizes.
The following specifically describes the optimization and adjustment of the processing technological parameters by using the characteristic polymeric part structure designed by the present embodiment, wherein the characteristic polymeric part structure is formed by machining with a numerical control machining center, and the cutting and processing tools are a hard alloy end mill with a working length of more than or equal to 100mm, a diameter of 20mm and 12mm, a tooth number of 4, a right-hand rotation, and a bottom hole twist drill with a diameter of 12.5 mm. The specific process is shown in fig. 4:
s1, aggregating various typical difficult-to-machine characteristics into a part structure by using three-dimensional modeling software, and establishing a three-dimensional model of the characteristic aggregated part structure for machining research;
s2, preparing a cuboid blank, wherein the outline size of the blank is as follows: 150mm multiplied by 100mm, the cuboid blank material of the embodiment is Ti-6 Al-4V;
s3: when in processing, the cuboid blank is horizontally placed on a workbench of a triaxial numerical control processing center to be processed with different cutting parameters, so as to obtain different geometric precisions and surface roughness;
s4: in the processing process, a natural thermocouple, a piezoelectric sensor or a patch type sensor is used for converting collected electric signals into temperature signals and force signals under the combined action of an amplifier and a collection card, so that cutting temperatures and cutting forces under different cutting parameters are obtained, and the measurement results are recorded in the following test table 1;
TABLE 1 cutting temperature and cutting force under different cutting parameters
| Serial number | Feed per tooth | Rotational speed | Cutting to depth | Width cutting | Cutting | Cutting temperature | |
| 1 | |||||||
| 2 | |||||||
| 3 | |||||||
| …… |
S5: measuring the flank wear VB of the end mill by using a microscope, and recording the measurement result in the following test table 2;
TABLE 2 wear loss of the tool
S6: respectively measuring the geometric accuracy and the surface roughness of the part by using a three-coordinate detector and a surface roughness meter, comparing and comparing the measured geometric accuracy and the surface roughness with a processing standard, and then recording a comparison result;
s7: and comparing according to the obtained result, adjusting the cutting parameters, and repeating the steps S3-S6 again until the optimal machining precision is obtained.
It will be apparent to those skilled in the art that various modifications and improvements can be made to the embodiments of the present invention without departing from the inventive concept thereof, and these modifications and improvements are intended to be within the scope of the invention.
Claims (9)
1. A characteristic polymerization part structure for processing research is characterized by comprising a closed deep cavity (1), an open deep cavity (2), a thin wall (3), a stepped hole (4), a large arc surface (5), an outer arc corner (6) and an inner arc corner (7);
the top surface of the closed deep cavity (1) is open, and the cavity depth is more than or equal to 80 mm; the top surface and the side surface of the open type deep cavity (4) are both open, and the cavity depth is more than or equal to 90 mm; the wall thickness of the thin wall (3) is between 1mm and 5mm, and the length is more than or equal to 50 mm; the central line of the stepped hole (4) is coincided with the central line of a small open structure, the small open structure is provided with an arc corner with the radius of 18mm or less, and the minimum aperture of the stepped hole (4) is 12mm or more; the large arc surface (5) is a multi-radius arc surface and has the total arc length of more than or equal to 150 mm.
2. A part structure according to claim 1, characterized in that said closed deep cavity (1) is a rounded rectangular cavity.
3. The part structure according to claim 1, characterized in that the symbiotic structure of the open deep cavity (2), the thin wall (3) and the large arc surface (5) is an arc inner cavity (8) with an open top surface; the thin wall (2) is a common wall of the open deep cavity (2) and the arc inner cavity (8); the large arc surface (5) is the arc side surface of the arc inner cavity (8).
4. A part structure according to claim 3, characterized in that said thin wall (2) is a common side of said closed deep cavity (1) and said circular arc inner cavity (8).
5. The part structure according to claim 1, characterized in that the outer and inner circular arc corners (6, 7) adjoin the thin wall (2).
6. A method for optimizing a machining process using a polymeric part structure according to claims 1-5, characterized in that it comprises the following steps:
s1: building a three-dimensional model of the feature polymeric part structure according to claims 1-5 using three-dimensional software;
s2: preparing a cuboid blank part;
s3: processing the cuboid blank part prepared in the step S2 by using a cutter with the processing length being more than or equal to 100mm and based on the three-dimensional model established in the step S1 according to different cutting parameters to obtain different processing precision;
s4: measuring cutting temperature and cutting force under different cutting parameters in the machining process;
s5: measuring the abrasion loss of the cutter after the machining is finished;
s6: measuring the machining precision of the part after machining;
s7: adjusting the cutting parameters according to the measurement results of the steps S3-S6, and repeating the steps S3-S6 again until the optimal machining precision is obtained.
7. The method of claim 6, wherein the cutting temperature and the cutting force are detected using a thermocouple and a cutting load cell in step S4.
8. The method of claim 6, wherein the wear degree of the tool is measured using a microscope in step S5.
9. The method according to claim 6, wherein in step S6, the machining accuracy under different cutting parameters is measured by using a three-coordinate measuring machine and a surface roughness tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336139.5A CN112464469B (en) | 2020-11-25 | 2020-11-25 | Characteristic polymerization part structure for machining research and machining process optimization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336139.5A CN112464469B (en) | 2020-11-25 | 2020-11-25 | Characteristic polymerization part structure for machining research and machining process optimization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112464469A true CN112464469A (en) | 2021-03-09 |
| CN112464469B CN112464469B (en) | 2022-05-17 |
Family
ID=74798272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011336139.5A Active CN112464469B (en) | 2020-11-25 | 2020-11-25 | Characteristic polymerization part structure for machining research and machining process optimization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112464469B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198186A (en) * | 2013-03-29 | 2013-07-10 | 南京航空航天大学 | Aircraft structural part cutting parameter optimization method based on characteristics |
| CN106406239A (en) * | 2016-11-29 | 2017-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Method of machining complicated surface efficiently |
| CN107831731A (en) * | 2017-10-31 | 2018-03-23 | 北京航空航天大学 | A kind of outer turning NC milling knife rail optimization method of die cavity of cutting forces simulation pre-adaptation |
| CN107991995A (en) * | 2017-12-01 | 2018-05-04 | 长春设备工艺研究所 | Titanium alloy NC Milling Technology parameter optimization method based on engineer testing data model |
-
2020
- 2020-11-25 CN CN202011336139.5A patent/CN112464469B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198186A (en) * | 2013-03-29 | 2013-07-10 | 南京航空航天大学 | Aircraft structural part cutting parameter optimization method based on characteristics |
| CN106406239A (en) * | 2016-11-29 | 2017-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Method of machining complicated surface efficiently |
| CN107831731A (en) * | 2017-10-31 | 2018-03-23 | 北京航空航天大学 | A kind of outer turning NC milling knife rail optimization method of die cavity of cutting forces simulation pre-adaptation |
| CN107991995A (en) * | 2017-12-01 | 2018-05-04 | 长春设备工艺研究所 | Titanium alloy NC Milling Technology parameter optimization method based on engineer testing data model |
Non-Patent Citations (1)
| Title |
|---|
| 丁俊健 等: "一种薄壁深腔壳体零件数控加工工艺研究", 《机床与液压》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112464469B (en) | 2022-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Oliaei et al. | Influence of tool wear on machining forces and tool deflections during micro milling | |
| Kilickap | Modeling and optimization of burr height in drilling of Al-7075 using Taguchi method and response surface methodology | |
| Essa et al. | Optimization of conventional spinning process parameters by means of numerical simulation and statistical analysis | |
| CN108405941A (en) | Blade of aviation engine blade type face high-efficiency and precision milling method | |
| CN102962654A (en) | Processing method for no-crown guide blade of steam turbine | |
| CN110281017B (en) | Drilling method for central hole of curved surface forging | |
| CN111843613B (en) | Five-axis gantry swing head space axis error value measuring method | |
| CN206356923U (en) | Modularity quickly positions lathe floral disc | |
| CN111975453B (en) | Numerical simulation driven machining process cutter state monitoring method | |
| Cheah et al. | Rapid sheet metal manufacturing. Part 2: direct rapid tooling | |
| CN106001715B (en) | A kind of U-shaped open accurate inner cavity thin-walled parts process of aluminium alloy | |
| CN107248047A (en) | Process method for evaluating state based on process state entropy dynamic calculation | |
| CN112464469B (en) | Characteristic polymerization part structure for machining research and machining process optimization method | |
| Jarosz et al. | Optimization of CNC face milling process of Al-6061-T6 aluminum alloy | |
| Ge et al. | On-machine measurement-based compensation for machining of thin web parts | |
| Patel et al. | A review article on process parameters affecting Incremental Sheet Forming (ISF) | |
| CN112395742B (en) | Clamp optimization method for clamping heat treatment of aero-engine blade | |
| CN106001338A (en) | High-temperature alloy no-allowance blade rolling method | |
| CN113182565B (en) | Weak-rigidity molded surface regional milling method | |
| Menezes et al. | Productivity progression with tool wear in titanium milling | |
| CN113806890A (en) | Verification method for machining process of turbine disc parts | |
| Shah | Application of Full Factorial Analysis Design For Determining Surface Roughness Model In End Milling of Hardened Steel Material Using Solid Carbide Niti Co 30 Standard End Mill | |
| Zhu et al. | Research on cutting force of turn-milling based on thin-walled blade | |
| Li et al. | Study on dynamic simulation and cutting parameters optimization on complex cutting conditions milling process | |
| Dolimont et al. | Effect of HIPping (Hot Isostatic Pressing) on electron beam melting Ti6Al4V parts after machining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |